Flow regulator



FIG. 1 is a top perspective view of a flow regulator showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a flow regulator, as shown and described. 